diff options
Diffstat (limited to 'pixman/pixman-format.c')
| -rw-r--r-- | pixman/pixman-format.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/pixman/pixman-format.c b/pixman/pixman-format.c index f89c7cf..7a8a93c 100644 --- a/pixman/pixman-format.c +++ b/pixman/pixman-format.c @@ -131,6 +131,43 @@ alloc_y422 (pixman_format_code_t format, return bits[0]; } +static uint32_t * +alloc_y420 (pixman_format_code_t format, + int width, + int height, + uint32_t ** bits, + int * rowstrides_bytes) +{ + int y_stride, uv_stride, y_height, uv_height, y_size, uv_size; + + if (pixman_addition_overflows_int (width, 7) || + pixman_addition_overflows_int (height, 1)) + return NULL; + + y_stride = ROUND_UP_4 (width); + uv_stride = ROUND_UP_8 (width) / 2; + y_height = ROUND_UP_2 (height); + uv_height = ROUND_UP_2 (height) / 2; + + if (pixman_multiply_overflows_int (y_stride, y_height)) + return NULL; + + y_size = y_stride * y_height; + uv_size = uv_stride * uv_height; + + if (pixman_addition_overflows_int (y_size, 2 * uv_size)) + return NULL; + + bits[0] = calloc (y_size + 2 * uv_size, 1); + bits[1] = bits[0] + y_size; + bits[2] = bits[1] + uv_size; + rowstrides_bytes[0] = y_stride; + rowstrides_bytes[1] = uv_stride; + rowstrides_bytes[2] = uv_stride; + + return bits[0]; +} + typedef struct { pixman_format_code_t format; pixman_bool_t supported_source; @@ -200,6 +237,7 @@ static const format_info_t format_infos[] = { /* planar formats */ { PIXMAN_y444, TRUE, TRUE, FALSE, 3, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_y444 }, { PIXMAN_y422, TRUE, TRUE, FALSE, 3, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_y422 }, + { PIXMAN_y420, TRUE, TRUE, FALSE, 3, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_y420 }, /* packed formats */ { PIXMAN_yuy2, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_bits }, { PIXMAN_yvyu, TRUE, TRUE, FALSE, 1, PIXMAN_COLOR_SPACE_YCBCR_SD, alloc_bits }, |